161349886 has 4 divisors (see below), whose sum is σ = 242024832. Its totient is φ = 80674942.

The previous prime is 161349847. The next prime is 161349887. The reversal of 161349886 is 688943161.

161349886 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 688943161 = 157 ⋅4388173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161349887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40337470 + ... + 40337473.

It is an arithmetic number, because the mean of its divisors is an integer number (60506208).

Almost surely, 2^161349886 is an apocalyptic number.

161349886 is a deficient number, since it is larger than the sum of its proper divisors (80674946).

161349886 is an equidigital number, since it uses as much as digits as its factorization.

161349886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80674945.

The product of its digits is 248832, while the sum is 46.

The square root of 161349886 is about 12702.3574977246. The cubic root of 161349886 is about 544.4059807371.

The spelling of 161349886 in words is "one hundred sixty-one million, three hundred forty-nine thousand, eight hundred eighty-six".